84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
/*
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* \brief Virtual-memory space
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* \author Norman Feske
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* \date 2015-05-04
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*/
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/*
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* Copyright (C) 2015-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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/* core includes */
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#include <vm_space.h>
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#include "arch_kernel_object.h"
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static long map_page_table(Genode::Cap_sel const pagetable,
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Genode::Cap_sel const vroot,
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Genode::addr_t const virt)
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{
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return seL4_ARM_PageTable_Map(pagetable.value(), vroot.value(), virt,
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seL4_ARM_Default_VMAttributes);
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}
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long Genode::Vm_space::_map_page(Genode::Cap_sel const &idx,
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Genode::addr_t const virt,
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Cache_attribute const cacheability,
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bool const writable,
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bool const executable,
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bool)
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{
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seL4_ARM_Page const service = _idx_to_sel(idx.value());
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seL4_ARM_PageDirectory const pd = _pd_sel.value();
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seL4_CapRights_t const rights = writable ? seL4_ReadWrite : seL4_CanRead;
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seL4_ARM_VMAttributes attr = executable ? seL4_ARM_Default_VMAttributes : seL4_ARM_Default_VMAttributes_NoExecute;
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if (cacheability == UNCACHED)
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attr = seL4_ARM_Uncacheable;
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return seL4_ARM_Page_Map(service, pd, virt, rights, attr);
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}
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long Genode::Vm_space::_unmap_page(Genode::Cap_sel const &idx)
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{
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seL4_ARM_Page const service = _idx_to_sel(idx.value());
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return seL4_ARM_Page_Unmap(service);
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}
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long Genode::Vm_space::_invalidate_page(Genode::Cap_sel const &idx,
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seL4_Word const start,
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seL4_Word const end)
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{
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seL4_ARM_Page const service = _idx_to_sel(idx.value());
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long error = seL4_ARM_Page_CleanInvalidate_Data(service, 0, end - start);
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if (error == seL4_NoError) {
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seL4_ARM_PageDirectory const pd = _pd_sel.value();
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error = seL4_ARM_PageDirectory_CleanInvalidate_Data(pd, start, end);
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}
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return error;
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}
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void Genode::Vm_space::unsynchronized_alloc_page_tables(addr_t const start,
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addr_t const size)
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{
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addr_t constexpr PAGE_TABLE_AREA = 1UL << PAGE_TABLE_LOG2_SIZE;
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addr_t virt = start & ~(PAGE_TABLE_AREA - 1);
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for (; virt < start + size; virt += PAGE_TABLE_AREA) {
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if (_page_table_registry.page_table_at(virt, PAGE_TABLE_LOG2_SIZE))
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continue;
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addr_t phys = 0;
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/* 1 MB range - page table */
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Cap_sel const pt = _alloc_and_map<Page_table_kobj>(virt, map_page_table, phys);
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_page_table_registry.insert_page_table(virt, pt, phys,
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PAGE_TABLE_LOG2_SIZE);
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}
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}
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